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Thermal Conductivity Enhancement of Coaxial Carbon@Boron Nitride Nanotube Arrays

Lin Jing ; Majid Kabiri Samani (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Bo Liu ; Hongling Li ; Roland Yingjie Tay ; Siu Hon Tsang ; Olivier Cometto ; Andreas Nylander (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Johan Liu (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Edwin Hang Tong Teo ; Alfred Iing Yoong Tok
ACS Applied Materials and Interfaces (19448244). Vol. 9 (2017), 17, p. 14555-14560.
[Artikel, refereegranskad vetenskaplig]

We demonstrate the thermal conductivity enhancement of the vertically aligned carbon nanotube (CNT) arrays (from ?15.5 to 29.5 W/mK, ?90% increase) by encapsulating outer boron nitride nanotube (BNNT, 0.97 nm-thick with ?3-4 walls). The heat transfer enhancement mechanism of the coaxial C@BNNT was further revealed by molecular dynamics simulations. Because of their highly coherent lattice structures, the outer BNNT serves as additional heat conducting path without impairing the thermal conductance of inner CNT. This work provides deep insights into tailoring the heat transfer of arbitrary CNT arrays and will enable their broader applications as thermal interface material.

Nyckelord: boron nitride nanotube; carbon nanotube arrays; coaxial structure; molecular dynamics simulation; thermal conductivity



Denna post skapades 2017-06-14.
CPL Pubid: 249779

 

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